Short line eliminator for duplicating machines



Jan. 9, 1945. L. A. AMIS 2,367,083 7 SHORT LINE ELIMINATOR FOR DUPLICATING MACHINES Filed July 12, 1943 INVENTOR.

zr'mp/w Patented Jan. 9, 1945 SHORT LINE ELIMINATOR Fon DUPLI- CATING MACHINES a Lewis AJAmis, l)allas','Tex. Application July 12, 1943, Serial No; l94,278 2 Claims i (o1.1o1 3s 1) This invention relatesto duplicating machines and it has particular reference to a short line eliminatorv for multigraphing machines.

The principal object of the invention is to pro;- vide a removable, or replaceable bar designed and arranged to be secured under tension of its mounting in selected type grooves of the printing segment of a multigraphing. machine to fill out the space unoccupied by the type of a short line and which latter, if not supported, produces an impression much deeper than that, of the full lines, making it impossible to reproduce a printed printing segmen ts of duplicating machines, re-

suitingv in overprinting in. these'lines. Among.

' the remedies employed is the type constructed sheet corresponding in uniformity and density to the type of atypewritten sheet which it is intended to simulate. Another object of the invention is to provide a short line eliminator consisting of a bar whose width and thickness is accurately determined to insure proper alignment with the type of the short line it supports as well as with juxtapositioned full lines and whose elevation with respect to the printing segment is such that it will yieldingly bear upon the stock and relieve the otherwise excess pressure which heretofore resulted in irregularities in printing density.

Still another object of the invention is to provide a short line eliminator 'whose mounting consists of a body having flanges shaped to be correspondingly received in the type grooves of the printing segment, and by virtue of the inherent resiliency of these flanges, the mounting is firmly held to insure the necessary rigidity of the bar, even in cases where the grooves vary in width. Moreover, this feature facilitates installation and removal of the device. i

With the foregoing objects as paramount, the invention has particular reference to certain features of accomplishment, to become manifest as the description proceeds, taken in connection with the accompanying drawing, wherein:

Figure 1. is a fragmentary perspective view'of a printing segment with the invention in place.

Figure 2 is a fragmentary view of the printing segment in longitudinal section, showing in elevation the invention installed in one of its type grooves.

Figure 3 is a view in vertical section taken on line 33 on Figure 2, and

Figure 4 is a perspective view of the invention per se.

especially for this purpose Whosefaces are elevated slightly above the common face of the remaining typeand which are used exclusive in lines whichdo not extend from margin to margin on the printing segment. Such a provision Whichrequires a complete auxiliary set of type lends to the expense and sometimes results in confusion ,of the type, creating a condition less satisfactory than that originally encountered. Hence, it is the intent of the invention to remedy the objectionable features withlittle expense, a saving in materials and minimum effort. 1

Accordingly, reference is primarily made to Figure 1 wherein I0 denotes fragmentarily the printing segment of a conventional duplicating machine, particularly a multigraphing machine. This segment is provided with relatively spaced, longitudinal grooves II to interlockably receive correspondingly shaped shanks of type, the same being fed into the grooves II from the end of the Continuing with a more, detailed "description of the drawing, it may first be mentioned that other and various forms of devices have been advanced for compensating for the pressure variance caused by the short lines of type in the latter to take their places in the copy. Certain of the lines of the copy being necessarily shorter than others, the type of these lines will not fill the grooves to the ends. Thus, an unbalanced condition results and a heavier impression will be made by these type due to the lack of support or backing in that portion of the copy unoccupied by type.

The invention consists of a bar l2 which has a smooth, rounded upper surface and a flat undersurface and is adapted to overlie the carbon printing medium l3 which, in turn, overlies the type carried by the printing segment Hi. This bar has an offset bend a near its tail portion of a degree sufficient to constrain the bar to lie while a line just short of a full line would re-- quire a bar of minimum length.

To support the bar l2, a mounting I5 is provided. This mounting consists of a comparatively thin sheet of resilient material, centrally bent into a shape conforming to the tail of the bar and has relatively parallel flanges or sides l6 which are capable of relative expansion and contraction be held by friction against too ready displacement. The length of the mounting I5 is such that sufficient bearing surface is afforded to hold the bar I2 against lateral movement from its aligned position with the type. On the other hand,

the flexibility of the flanges l6 permits the bar to be quickly and conveniently removed or interchanged.

It is apparent from the foregoing that when a short line occurs in the setting of type in the printing segment ID, a bar I2 is selected which is of. a length substantially equal to the unoccupied part of the line and its mounting I6 is slid into the groove retaining the short line of type. The

bar 12 is placed over the carbon ribbon l3 and as y the printing segment revolves, the short line is supported and the impression made thereby is exactly equal in density to that of the remaining type, thereby producing copy simulating that of a typewriter.

Manfestly, the construction as shown and described is capable of some modification and such modification as may be construed to fall within the scope and meaning of the appended claims is also considered to be Within the spirit and intent of the invention.

What is claimed is:

1. As a new article of manufacture, a device for compensating for short lines of type in a multigraphing machine, comprising a bar in parallelism with the type grooves of the printing segment of said machine and of Plano-convex form in transverse section and having an anchorage in a type groove but bent adjacent said anchorage to dispose the bar proper above the plane of the transfer medium overlying the type in said grooves, said anchorage comprising a pair of coextensive, confronting tongue members of resilient material depending from the bent end of said bar, adapted to be slid into a type groove from the end thereof and lying below the common face of the typ in said groove.

2. A short lin compensating device for a multigraphing machine, comprising a bar of pianoconvex cross-section and having a bend adjacent one end parallel with the bar to dispose the latter above the transfer medium overlying the printing segment of said machine, .an anchorage for said bar disposed below the common face of the type mounted in said printing segment and comprising a resilient plate bent to embrace one end of said bar and to define relatively parallel and confrontin tongues conforming to and frictionally receivable in a selected type groove of said printing segment from an end thereof, to hold said bar against longitudinal and lateral displacement with respect to said segment.

LEWIS A. AMIS. 

